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About the Role

As a Senior AI Security Engineer, you will play a hands-on role in building and embedding security controls, guardrails, and tooling to support the safe use of AI across Westpac. You will develop production-grade code and reusable patterns to protect AI-powered applications and agent-based workflows, while working across application security and AI engineering to ensure solutions are secure by design. The role focuses on enabling the adoption of technologies such as Large Language Models (LLMs) and autonomous agents within a complex and highly regulated environment.

Responsibilities

Design and implement security guardrails for AI and agent-based applications, including controls for input/output filtering, prompt injection and agent permissions
Develop production-quality Python code for security controls, middleware and testing across LLM applications, RAG pipelines and multi-agent systems
Build reusable security patterns, libraries and reference implementations to support secure AI development
Perform threat modelling and adversarial testing, covering risks such as data leakage, model evasion, prompt injection and agent misuse
Embed automated security checks into AI/ML pipelines, including supply chain validation, dependency analysis and runtime monitoring
Work with data, platform and engineering teams to integrate security into AI workflows and contribute to standards aligned with industry frameworks

Requirements

Proven experience implementing security guardrails in AI and agent-based applications, including prompt safety, data protection and agent control mechanisms
Experience building and delivering reusable AI security libraries, patterns and reference implementations used by engineering teams
Hands-on experience integrating automated security testing and validation into CI/CD and ML pipelines
Demonstrated experience identifying and reducing AI-related security risks through prevention, detection and control implementation
Experience developing or contributing to AI security standards, guidance and enablement materials for engineering teams
Strong background in AI/LLM security, Python-based security engineering, application security and threat modelling, with exposure to agentic frameworks, ML pipeline security and cloud platforms

Skills

AI Security
Agent-based applications
Prompt safety
Data protection
Agent control
Python
Security controls
Middleware
Testing
LLM applications
RAG pipelines
Multi-agent systems
Security patterns
Libraries
Reference implementations
Threat modelling
Adversarial testing
Data leakage
Model evasion
Prompt injection
Agent misuse
Automated security checks
AI/ML pipelines
Supply chain validation
Dependency analysis
Runtime monitoring
Application security
ML pipeline security
Cloud platforms
Agentic frameworks

Experience Level

Senior

Benefits

Special offers on banking products
Discounts from top brands
Generous employee mortgage rates
Flexible work arrangements
Variety of leave options (Culture, Lifestyle, Wellbeing)
Tailored learning and development opportunities
Opportunities to give back to the Community through volunteering initiatives

About the Company

We’re obsessed with becoming our customers' #1 banking partner for life and we’re looking for people who are passionate about helping us achieve that goal.
In return, we’re committed to making Westpac the best place to work in the country.

Equal Opportunity

We’re all about creating a supportive and inclusive community. We welcome everyone no matter your age, gender, background, or abilities.
We also provide additional support to welcome our veterans, Indigenous Australians and neurodiverse community.
If you need any adjustments during the recruitment process, you can find out more information and additional contact details by visiting the "People with Disability and/or needing Accessibility Requirements" page on our website [https://www.westpac.com.au/about-westpac/inclusion-and-diversity/Inclusion-means-everyone-matters/disability-and-accessibility/].